/Engine/Source/Runtime/Landscape/Classes/LandscapeInfo.h
void GetComponentsInRegion ( int32 X1, int32 Y1, int32 X2, int32 Y2, [TSet](API\Runtime\Core\Containers\TSet)< [ULandscapeComponent](API\Runtime\Landscape\ULandscapeComponent) * > & OutComponents, bool bOverlap ) const